Gyratory pump



Sept. 25, 1928.

J. 0. CARREY GYRATORY PUMP Filed March 15, 1926 3 Sheets-Sheet 2* Sept. 25, 1928. l1,685,397 i J. O. CARREY l GYRATORY PUMP Filed March 15, 192e 3 sheets-sheet 3 LZTFMS.

Patented Sept. 25, 1928.

UNITED STA-TES PATENT OFFICE.

JOHN 0. CARREY, OF ST. LOUIS, MISSOURI, ASSIGNOB TO C.' & C. ENGINEERING COI- PLNY, INC., 0F ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

Gm'ron mi.

Application tiled latch 15, 1926. Serial llo. 94,788.

My invention relates to gyrator pum `s, the objects of my invention being to genera ly improve upon and simplify the construction of this type of pump and to provide a rela-.A

tively simple and easily operated device that is highly effective in the exhausting or compressing of air, gas, or other fluids.

Further objects of my invention are to provide a simple and eflicient seal between the fixed an-d movable parts of the gyratory pump so as to minimize the leakage of the fiiud from the operating chamber and to provide simple valve means for controlling the passage of fiuid from the operating or compression chamber.

Other objects of the invention are to provide a floating end plate for sealing one endv of the operating or compressing chamber, said end plate being movable laterally to open and close the outlet port of said compressing chamber so as to control the discharge of fluid therefrom to the high pressure chamber.

With these and other objects in view, my invention consists in certain novel features of construction and arrangement of parts, hereinafter more fully described and claimed, and illustrated in the accompanying drawings, in which- Figure 1 is a horizontal cross section through my gyratorypump.

Figure 2 is a vertical cross section taken on line 2 2 of Figure 1.

Figure 3 lis a vertical cross section taken on line 3--3 of Figure 1.

Figure 4 is a vertical cross section taken on line 4 4 of Figure 1.

Figure 5 is a fragmental detail view similar to Figure 4 but showing the end plate in moved or closed position.

Figure 6 lis a horizontal cross section taken through a modified form of my gyratory pump.,

Figure 7 is a perspective detail view of the gate valve shown in Figure 6.

Figure. 8 is a perspective view of the recess member adapted to receive the gate valve.

The invention is characterized by the use of a gyratory element preferably a circular or ring-shaped member that is arranged` for operation within a suitable housing and actuated by means of an eccentric mounted on the driving shaft ofthe pump. The discharge of the fluid from the operating chamber of the pump is effected by a floating plate which is arranged adjacent to one endof said operatformed a high pressure chamber 13 which is closed by head 14. This head is provided with a hollow boss portion 15 in which is arranged a ball bearing 16 for receiving a shaft 17. Flange 12 of casing 10 is secured to a head 18 which, in the present instance, is provided with abushing 19 for receiving the intermediate portion of shaft 17.

- The gy'ratory pump illustrated in the drawings is of the two stage type and consequently .shaft 17 extends through bushing 19 and has its end journaled in a bearing 20 which is located in the cap extension 21 of a head 22. This head is boltedV to a cylindrical extension 23 of a casing 10, the opposite end of said casing being secured to the other end of head 18. Cylindrical extension 23 forms a high pressu're chamber 13a which is similar in construction to chamber 13 and is located on the optrated in the drawings is designed to be used as a two stage compressor, casing 10 housing the primary or low pressure unit and casing 10EL housing the secondary or high pressure unit, casin 10 being reduced in width as shown in Figure 1.

An eccentric 25 is fixed to shaft 17 and extends the full width of compressing chamber A which chamber is formed by casing 10. A similar eccentric 26 'is fixed to shaft 17 and 'operates in compressing chamber B of casing 10. However, eccentric 26 is offset with eccentric 25, being preferably onehundred eighty degrees apart from said eccentric 25.. Loosely arranged on eccentric 25 is an eccentric 2 7 and this last mentioned eccentric is set at an angle to eccentric 25 and is self adjustable so as to maintain the outer face of a gyratory element 28- in surface contact with the inner face of casing 10. This gyratory element 28 is loosely mounted on eccentric 27 by means of a roller bearing 29 which is interposed between said element and eccentric 27 posite side of the pump. The pump as illus- The fluid., is drawn into chamber A through intake ports 30 formed in an enlargement 10 of casing 10. A cap 31 is secured to enlargement 10c and secures one end of a pipe connection 32 to said inlet ports 30. A gate valve 33 is slidably mounted in casing 10 and extends radially into chamber A and bears against the outer face of gyratory element 28. The inner end of said gate valve has fixed thereto a plunger 34 which operates in a bore 35, the outer end. of which is closed by a screw plug 36. Gate valve 33 is held in fluidtight contact with the inner face of element 28 by virtue of the fluid pressure created in bore 35 and exerting pressure against the inner end of pin 34.

As the shaft rotates in the direction indicated by the arrow in Figure 3, the line of contact between the gyratory element 28 and the inner face of casing 10 gradually advances from the inlet openings 30 toward gate 33, thereby placing the fluid contained in the 'upper half of chamber A or the fluid contained between the gate valve 33 and the line of contact between the gyratory element 28 and casing 10 under pressure at the same time forcing it out from chamber A through a duct 37 formed in the upper face of gate 33 into gate chamber 38 from which it then escapes into high pressure chamber 13, one end of gate chamber 38 communicating with an arcuate groove 39 which latter is formed 1n the face of flange 11 to facilitate the discharge of the compressed Huid into high pressure chamber 13. "f

y This arcuate slot or discharge port is controlled and adapted to be closed by a circular plate 40 which bears against the face of flange 11 and receives gyratory'motion to open and close p ort 39 in proper time relation with the operation of gyratory element 28 in chamber i The gyratory movement is imparted to circular plate 40 by means of an eccentric 41 which is fixed on shaft 17 to one side of eccentr1cs 27 and 25 and is disposed at a suitable angle to said eccentrics to insure proper positioning ofplate 40.

From high pressure chamber 13 the compressed fluid is conveyed away by a pipe connection 42. In the two stage compressor pipe connections 42 are connected to the inlet port of casing 10 as shown in Figure 1 and discharge the partially compressed 'fluid to chamber B where it is compressed by a gyratory element 43 which is mounted by means of roller` bearings 44 on an adjustable eccenv tric 45, the latter being mounted on fixed eccentric 26.

A gate valve 46 is arranged in chamber B and has fixed thereto plunger 47, which operates in bore 48, the latter being closed by a screw plug 49. A groove 50 formed in the upper face of gate valve 46 admits the vcompressed fluidfrom chamber B into the gate chamber 51 from which it is then discharged through an arcuate groove 52 into high pressure chamber 13 and a pipe connection 53 conveys the fluid away from chamber 13a. A circular plate 54 which is similar to plate 40 is mounted on an eccentric 55 and opens and closes discharge port 52 in correlation with the operation of gyratory element 43 in chamber B.

To prevent escape of fluid from high pressure chambers 13 and 13a along the shaft outwardly to the atmosphere, or to the compressing chambers, each head 14 and 22 is provided with inwardly extending tubular portions 56 which terminate a short distance from circular plates 40 and 54 and carry seal rings 57' which are loosely arranged on said tubular extensions and have their inner ends bearing against circular plates 40 and54. The outer ends of these rings 57 are provided with a series of apertures for receiving small coil p respective faces ofsaid tubular portions 56 and rings 57. In this manner, all danger of leakage of the fluid to the atmosphere is reduced to minimum and plates 40 and 54 are held to their seats by the pressure in chambers 13 and 13, while springs 58 serve to exert'enough pressure against said plates during the starting operation of the com- .pressor or when there is no pressure in said chambers 13 and 13a. Casing 10 is provided with a series of outwardly extending projections or pins C which serve to dissipate the heat produced during the operation of the compressor. f

A duct 60 leads from each compressing chamber A to bore 35 and admits fluid thereinto so that plunger 34 is placed under pressure and holds partition wall member 33 in proper contact with gyratory member 28. Eccentrics 27 and 46 are automatically adjustable on eccentrics 25 and 26, respectively, so as 'to maintain gyratory members 28 and 23 in proper Contact with the internal faces of the respective compressing chambers.

As the shaft 17 rotates in the direction indicated by the arrow, the point of contact of each gyratory member and the face of the respective compressing chamber advances toward each partition wall member, thereby ber between these points and e'xpels said fluid from said chamber under pressure through passageways formed in the high pressure sides of the respective partition wall members. In the first stage of compression, the fluid is expelled through passageway 374mto recess 38 from which it escapes through the arcuate groove 39 into high pressure chamber 13. A pipe connection 42 conveys the fluid away from the high pressure chamber 13.

When the fluid is discharged from the high pressure side of the compressing chamber a new discharge of fluid is drawn into the low pressure side through pipe connection 32 and intake ports 30. When the high point of gyratory member 28 during its gyratory movement engages partition wall 33, the latter'is retracted into recess 38, thereby closing passageway 37 to the compressing chamber. Simultaneously with this or in proper time relation with the positioning of member 33, member is actuated to close slotv 30 so that high pressure chamber 13 is scaled against communication with the compressing chamber A. After the highpoint of member 28 Y leaves member 33 and passes intake ports 30,

member 33 is rojected into the compressing chamber asu cient distance to permit passageway 37 to communicate with the compressing chamber A.

The movement of plate 40 may be timed so as to open the groove 39 at a predetermined time during the movement of gyratory member 28 or after the fluid contained in the high pressure side of the compressing `chamber has een placed under suicient pressure.

When the device is to be used as a vacuum pump, pi e connection 32. is connected to the`cham er to be placed under vacuum, while pipe connection 42 may be left open to the atmosphere.

In t-he form shown in Figures' 6 to 8, a gyratory member 61 is provided with a radial projection 62 which operates in a recess 63 formed in the wall of the compressing chamber. This projection 62 is adapted to move inwardlfv and outwardly in recess 63 and the lower ace 62l of said projection is at all times in contact with face 63a of said recess in order to prevent passage of fluid from the. high pressure side of partition member 62 to the low pressure side thereof.

-The upper face of'm'ember 62 is provided with a groove or `passageway 64 for facili-` 'formed in a block 69 which is seatedin, a'

pocket formed in the wall. oi the compressing chamber and is removable therefrom as shown in Figure 8. By making members 62 and 69 removable the can -be manufactured more accurate and at ess expense and can be cast hardened if necessary.

A device of my improved construction is motor.

While I have shown the preferred forms of my improved pump, it is obvious that various changes in the construction andarrangement of parts can be made and substituted for those herein-shown and described without departing from the spirit of my invention as expressed in the appended claims.

I claim:

1. In a gyratory pump a casing provided with a compression chamber, an eccentrically mounted member arranged for gyratory movement in said chamber for compressing fluid therein, an element mounted so as to project into said chamber and be retracted therefrom to maintain contact with the periphcry of said member, an outlet duct in said clement and leading into a high pressure chamber arranged in said casing, an outlet passage leading from said pressure chamber space, and can'be coupled directly-to the outwardly through one end of said casing, and

a gyrat'ory plate operable independently of and in correlation with said gyratory member for controlling said outlet passage;

2. A gyratory pump comprising 1n combination a casing providedwith a compression chamber, an eccentricallymounted member arranged for gyratory movement in said chamber for compressing fluid therein, an element in engagement with the wall of said chamber and with said member and movable in a radial direction to provide a partition wall in said chamber, said element being provided with a discharge duct leading trom said compression chamber into a high pressure chamber formed in said casin an outlet passage opening from said hig pressure chamber through one end of said casing and a gyratoryl plate operable independently of and in correlation with said gyratory member for controlling said outlet passage.

3. A gyratory pump .comprising a casing havinga cylindrical compression chamber, a fluid inlet port and a fluid outlet port arranged-in said casing and opening into said chamber, a gyratory member dis osed in said chamber and cobperating with t e inner face thereof, a plate in engagement with the wall of said chamber and with said gyratory meniber thereby forming a partition wall in said chamber separating said inlet and outlet ports, and an end plate for sealing one end of said chamber and operable to open and close'said discharge port.

and provided with inlet and outlet ports, a

centrally arranged shaft extendin through said chamber, a gyratory member disposed in said chamber in cooperative relation with the inner face thereof and operatively carried by said shaft, a slidable plate mounted in said, casing and extending into said chamber in engagement with said compression chamber a high pressure chamber formed in one end of said casing andhaving said outlet ort opening thereinto, an end plate dispose in said high pressure chamber, an eccentric fixed to said shaft and carrying said plate and adapted to o crate the latter to, open and close said outlet port in correlation with the operation of said gyratory member.

5. A gyratory pump comprising a casing having a cylindrical compression chamber and provided with inlet and outlet orts, a `centrally arranged shaft extending t rough said chamber, a gyratory member disposed in said chamber in cooperative relation with the inner face thereof and operatively carried by said shaft, a slidable plate mounted in said casing and extending into said chamber in engagement with said gyratory member to form a partition wall in said compression chamber, a. high pressure chamber formed in one end of said vcasing and having said outlet port opening therelnto, an end late disposed in said high pressure chamer, an eccentric fixed to said shaft and carrying said plate and adapted to operate the latter to open and close said outlet ort in correlation with the operation of sai gyratory member, a head for closing said high pressure chamber and provided with an inwardly extending annular flange, a sleeve arranged exteriorly of said flange and in sealing contact with said plate, and packing rings interposed between the cooperating surfaces of said sleeve and said ange.

6. A gyratory pumpcomprising a casing provided 'with a cylindrical compression chamber and a high pressure chamber, a. gyratory member arranged in said compresslon chamber, an end 'plate in said high pressure chamber'for closing one end of said compression chamber, said end plate being adapted to be acted upon by the fluid pressure in said high pressure chamber to maintain a uid tight seal with said compression chamber, and a discharge passage leading from the high pressure side of said compression chamber into said high pressure chamber.

7. 'A gyratory pump comprising in combination a casing provided with a cylindrical ',compression chamber and a high pressure chamber,'a shaft journaled in said casing and extending through said chambers, a gyratory membercarried by said shaft and operating in said compression chamber, a radially movable partition wall cooperating with said gyratory member and engaging a recess 'formed in the wall of said compression chamber, a circular plate arran ed on said shaft in said high pressure cham er, a passageway leading from the high pressure side of said compression chamber into the recess of Said partition wall, and a discharge port leading from said recess into said high pressure chamber whereby said end plate is adapted to be acted upon by the Huid pressure in said high pressure chamber to maintain a fiuid tight seal with the end of said compression chamber.

8. A gyratory pump com rising in combination a casing provided with a cylindrlcal 'compression chamber and a hi h pressure chamber, a shaft journaled in 'sai casing and extending throu h said chambers, a gyratory member carried y said shaft and operating in said compression chamber, a radiall movable partition wall cooperating wit said4 gyratory member andv engaging a. recess formed in the wall of said compression chamber, a circular plate arran ed on said shaft in said high pressure cham r, a passageway leading from the high pressure side of said compression chamber into the recess of said partition wall, a ldischarge port leadingkfrom said recess into said high ressure chamber whereby said end plate is a apted to be acted upon by the fluid pressure in said high pressure chamber to maintain a Huid tight seall with the end of said compression chamber, and means operated by said shaft for actuating said cnd plate to o n and close said discharge port in correlation with the operation of said gyratory member.

9. In a device of the class described a casing provided with a cylindrical compression chamber and having a high pressure chamber arranged at one end, a head for closing said high pressure chamber, a shaft extending through said chambers and having bearings in said head andA in said casing, a gyratory member carried by said shaft and operating in said compression chamber, a valve member movablv mounted in said compression chamber and engaging said gyratory member, an intake ort leading to the' low pressure side of saidp compression chamber, a discharge port leading from the high pressure side of said compression chamber, an end plate arranged on said shaft in said high pressure chamber for sealing said com ression chamber and adapted to be held t ereagainst by the Huid pressure prevailing in said high pressure chamber, and a sleeve interposed between said plate and said head for exerting yielding pressure against said plate, there being an extension formed on said head for supporting said sleeve in position.

10. In a device of the class described a casing provided with a cylindrical compression chamber and having a high pressure chamber arranged at one end, a head for closing said high pressure chamber, a shaft extending through said compression chamber and having bearings in said head and in said casing, a gyratory member carried by said shaft and operating `in said compression chamber, a partition wall member movably interposed between the inner face of said compression chamber and said gyratory member, an intake port leading to the low pressure side of said compression chamber, a discharge port leading from the high pressure side of said compression chamber, an end plate arranged on said shaft in said high pressure chamber for sealing said compression chamber and adapted to be held thereagainst by the fluid pressure prevailing in said high pressure chamber, a sleeve bearing plate for exerting initial pressure thereagainst, there being an extension formed on said head for supporting said sleeve in position and resillent means interposed between said sleeve and said head.

11. In a device of the class described a casing provided with a cylindrical compression chamber and having a high pressure chamber arranged at one end, a head for closing said high pressure chamber, a shaft extending through said compression chamber and having bearings in saidhead and in said casing, a gyratory member carried by said shaft and operating in said compression chamber, a partition wall in said compression chamber engaging said gyratory member and slidable into a recess formed in the wall of said compression chamber, an intake port leading toI the low pressure side of said compression chamber, a discharge port leading from the high pressure side of said compression chamber, an end plate arranged on said shaft in said high pressure chamber for sealing one end of said compression chamber and adapted to be held thereaga-inst by the fluid ressure prevailing in said high pressure c amber, a sleeve interposed between said plate and said head for exerting initial pressure against said plate, a flange projecting inwardly from said head for sup orting said sleeve, and packing rings in saidp flange for sealing the joint therebetween and said sleeve. l

12. In a device of the class described a casing provided with a cylindrical compression chamber, a shaft extending through saidv chamber, an eccentric fixed to said shaft, a second eccentric loosely arranged on said first eccentric, a ringloosely mounted on said second eccentric and 'adapted to gyrate within said compression chamber in tangential contact with the inner face thereof, a plate radially disposed between said gyratory member and the wall of said chamber and forming a partition wall in the'latter, said member being provided with a passage on its high pressure side, a discharge port communicating with said passage, and an intake port leading into said compression chamber on the low pressure side thereof.

13. In a device of the class described a casing provided with a cylindrical compression chamber, a shaft extending through said chamber, an eccentric fixed to said shaft, a Second eccentric loosely arranged on said first; eccentric, a ring loosely mounted on said second eccentric and adapted to gyrate wit-hin said compression chamber in tangential cont-act with the inner face thereof, a plate radially disposed between said gyratory member and the wall of said chamber and forming a partition wall in the latter, said member being provided with a passage on its high pressure side, a discharge port communicating with said passage, an intake port leading into said compression chamber on the low Apressure side thereof, and a gyratory plate carried by said shaft on one l.sideof said compression chamber and adapted to open and close said discharge port.

14. In a device of the class described a casing provided with a cylindrical compression chamber, a shaft extending through said chamber, an eccentric fixed to said shaft, a lsecond eccentric loosely arranged on the first eccentric, a ring loosely mounted on the second eccentric and adapted to gyrate within Said compression chamber in tangential contact with the inner face thereof, a plate radially disposed between said gyratory member and the wall of said chamber and forming a partition wall in t-he latter, said member being provided with a passage on its high pressure side, a discharge port communicating with said passage, an intake port leading into' said compression chamber on the low pressure side thereof, an end plate arranged in said casin ,adjacent to one end of said compression camber and loosely carried by said shaft, said end plate being adapted to seal one end of said compression chamber, a head for closing the respective end of said casing and provided with an inwardly projecting flange, and a sleeve arranged on said flange and yieldingly held against said plate to `maintain the latter under pressure against the end of said compressing chamber.

15. In a device of the class described a casing provided with a cylindrical compression chamber, a shaft extending through said chamber, an eccentric fixed to said shaft, a second eccentric loosely arranged on said first eccentric, a ring loosely mounted on the second eccentric and adapted to gyrate within said compression chamber in tangential contact with the inner face thereof, a plate radially disposed between said gyratory member and the wallof said chamber and forming a partition wall in the latter, said member being provided with a passage on its high pressure side, a discharge port communicating with said passage, an intake port leading into said compression chamber on the low pressure side thereof, an end plate arranged in lsaid casing adjacent to one end of sai compression chamber and loosely carried by said shaft, said end plate being adapted to seal said end of said compression chamber, a head for closing the respective end of said casing and provided with an inwardly projecting flange, a sleeve arranged on said flange and yieldingly held against said'plate to maintain the latter under pressure against said compression cliamber, and packing rings arranged on. said flange and bearing against said sleeve to form a Huid tight joint there between.

l16. In a device of the class described a casing provided with a cylindrical compression chamber close-d at one end and terminating at the opposite end in a high pressure chamber, a removable head for closing said high pressure chambers and having bearings in said head and in said casing, a gyratory member carried by said shaft and operating in said compression chamber, a longitudinal parti- -tion Wall arranged in said compression chainlber in engagement with said gyratory member and retractable into a recess formed in the Wall of said compression chamber, an intake port leading to the lors7 pressure side of said compression chamber, a discharge port leading from the high pressure side ot said compression chamber into said high pressure chamber, an end plate arranged onsaid shaftvin said high pressure chamber for sealing the open end` of said compression chamber, and auxiliary means'for yieldingly exerting pressure against said plate to maintain it in sealing contact with said compression chamber during the starting operation, said plate being adapted to be held against said end of said compression chamber by the iuid pressure prevailing in said high pressure chamber when the device attains its normal operating pressure.

17.' In a device of the class described a casing provided with a cylindrical compression chamber closed at one end and terminatin at the opposite end in a high pressure vchain er, a removable head for closing said high pressure chamber, a shaft extending through said compression chamber and having bearings in said head and in said casing, a gyratory member carried by said shaft and operating in said compression chamber, a partition wall arranged in said compression chamber in engagement With said gyratory member andretractable into a recess formed in the wall of said compression chamber, an intake port leading to the-lov:r pressure side of said compression chamber, a discharge port leading from the high pressure side of said compression chamber into said high pressure chamber, an end plate arranged on said shaft in said high pressure chamber for sealing the open end of said compression chamber, auxiliary means. for exerting yielding pressure against said plate to maintain it in sealing contact With said compression chamber during the starting operation, said plate being adapted to be held against said end of said compression chamber by the fluid pressure prevailing in said high pressure chamber when the device attains its normal operating speed, and means operable in correlation with said yratory member for actuating said end plateI to open andv close said discharge port.

In testimony Whereofl hereunto aflix my signature this 26th day of February, 1926.

JOHN O. CARREY.

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